TH72005 Datasheet, PDF (7/20 Pages) Melexis Microelectronic Systems – 315MHz FSK/ASK Transmitter

3 Pin Definition and Description
Pin No. Name
1 ASKDTA
I/O Type
input
Functional Schematic
0: ENTX=1
1: ENTX=0
ASKDTA
1
1.5kΩ
2 FSKDTA input
FSKDTA
2
1.5kΩ
0: ENTX=1
1: ENTX=0
3 FSKSW
analog I/O
FSKSW
3
4 ROI
5 ENTX
analog I/O
input
25k
ROI
4
36p
36p
ENTX
5
1.5kΩ
TH72005
315MHz
FSK/ASK Transmitter
Description
ASK data input,
CMOS compatible with op-
eration mode dependent
pull-up circuit
TX standby: no pull-up
TX active: pull up
FSK data input,
CMOS compatible with op-
eration mode dependent
pull-up circuit
TX standby: no pull-up
TX active: pull up
XOSC FSK pulling pin,
MOS switch
XOSC connection to XTAL,
Colpitts type crystal oscilla-
tor
mode control input,
CMOS-compatible with in-
ternal pull-down circuit
6 PSEL
analog I/O
7 VEE
8 OUT
ground
output
8µA
PSEL
1.5kΩ
6
VCC
OUT
8
power select input, high
impedance comparator logic
TX standby: I_PSEL = 0
TX active: I_PSEL = 8µA
negative power supply
power amplifier output,
open collector
VEE
9 VEE
ground
10 VCC
supply
VEE
negative power supply
positive power supply
39010 72005
Rev. 008
Page 7 of 20
Data Sheet
June/07